why do truck drivers

My station has receiver sensitivity of
-125 DB. I can hear people 20 miles away on a little battery powered walkie talkie that they sell in the truck stops. So it's not too difficult for me to hear someone in a truck with a much larger antenna 10 miles further. I've heard people in cars with a wilson 5000 magnet mount 45 miles away. I've only found 2 technicians anywhere in the country that can drop the noise floor of a receiver and do receive like that. I guess my technicians $7,000 power supply comes in handy for something. A cheap power supply generates noise which prevents most technicians from being capable of dropping a noise floor low enough to be able to improve the signal to noise ratio much.

 

If you had receive like mine you would notice it on a daily basis. It's not going to happen with a stock radio because if you turn your squelch knob all the way to the left and your RF gain knob all the way to the right you will notice static. That static is what prevents you from hearing weak signals. You need to find a technician that is capable of eliminating that static from your receiver to allow you to hear those weak signals. Keep in mind there's only two technicians anywhere in the country that are capable of tuning a receiver in a way that would allow a .001uv signal to produce an audible tone in your receiver. How far you transmit is greatly determined by my receiver sensitivity. I will hear you further than anyone else.

 

Military specs only apply to military equipment. Military specs do not apply to cheap Chinese Components inside these cheaply built CB radios from China . Precisely why you need a good technician to reengineer the receiver circuit with higher quality components with greater tolerances and lower noise.
Sometimes you gotta think outside the box and don't look at the limitations of the equipment you have sitting in front of you. Instead you need to look at the possibilities. Optimism motivates us to accomplish things while pessimism prevents us from accomplishing our goals. But if you have a CB radio with a noise floor as low as you claim with a copper antenna over 4 feet in length there is absolutely no reason why you shouldn't be able to hear a stock CB radio in a brand new truck with factory antennas across flat ground like Ohio or Indiana 30 miles away.
Keep in mind that radio will not be able to hear you at that distance unless the receiver is tuned the same way as yours. Or unless you are running a decent amount of power to penetrate his terrible receive. The Sanyo 2SC2999 transistor is just the tip of the iceberg and Schottky diodes aren't even part of the equation.